Red Bull are adamant that the problems they faced in Bahrain on Wednesday were not related to the issues they experienced in Jerez.
Having completed just 21 laps across four days of testing in Spain, Red Bull would have been hopeful of starting afresh in Bahrain on Wednesday.
Instead, world champion Sebastian Vettel completed just 14 laps before his RB10 stalled on the track.
Race Engineering Co-ordinator Andy Damerum insists significant improvements were made since Jerez, though he concedes they are still playing catch-up.
"It's been a very long two weeks for everyone back at the factory and I have to say that while it might not appear so on the surface there has been a big improvement since Jerez," Damerum said.
"We are obviously playing catch-up and for us this was very much like a first test, so we were sending the car out to do one lap, then two and trying to build from there. In that regard the laps completed were good. However, we were sidelined by a mechanical gremlin but one unrelated to the issues in Jerez.
"That's the way of testing. All these problems have to be ironed out and only reveal themselves as you progress. We'll look at solving that issue now and we're itching to get out on track again tomorrow."
Vettel, meanwhile, admits the team is less than happy about the problems they've been dealing with in pre-season, but says the situation is not entirely unexpected.
"Obviously we're not happy with where we are now and we have a long way ahead of us," the German confessed.
"The first gut feeling from the car is OK, but we need more running. It's not easy to find a quick fix, but I think we understand the problems. We sorted out the issues from Jerez and we were able to do some laps today.
"However, very often you fix one problem and another pops up, which is what happened. That's testing. We all knew this year was a massive challenge and we knew it would be difficult. We obviously didn't want this, but it is what it is and we are working flat out to solve the problems."